Hi to all,
This is a '91 model, 2.1L Vanagon, gas, 2wd,
I am using my Digitool and with a new Oxygen sensor I'm getting 10.6 volts on the "Oxygen sensor ground" reading.  It started off with (minus) -0.2, and it supposed to be about 0 (zero), which was fine, then very soon it jumped to 10.6 and staying there.  Before I installed the new sensor, the old one was doing the same.  
Question; any of you know about this kind of thing? and if yes, what to do with it?  I'm having 10 mpg with this van.  
Most of the things have already been changed, like the wires, plugs, cap and rotor, temp. II sensor, and now the Oxygen sensor, and the timing is right.  
Any ideas?
Zoltan